Dissolving device



" Feb. 23,1926.

1,574,561 E. CZAPEK ET AL Y DI S SOLVING DEVICE Filed Sept. 1, 1925 IIIHIIIIIT MIM r Km m Patented Feb. 23, 192%.

UNITED STATES PATENT OFFICE.

EMIL CZAPEK AND RICHARD WEINGAND, OF BOMLITZ, NEAR WALSBODE, GERMANY.

DISSOLVING DEVICE.

Application filed September 1, 1925.

To all whom it may concern:

Be it known that we, Dr. EMIL CzArEK, a citizen of the Czechoslovakian Republic, and RICHARD TVEINGAND, a citizen of the German Republic, residing both at Bomlitz, near Walsrode, Germany, State of Prussia, have invented certain new and useful Improvements in a Dissolving Device, of which the following is a specification.

This invention has reference to improvements in means of effecting solutions of solid substances in liquids, and it is intended to provide for a more thorough and more rapid dissolving of the particular substance in the solvent. It has already been suggested to effect the solution of solid substances in liquids by means of devices consisting of two receptacles or containers connected to each other both at their tops as well as at the bottom, and in which the solid substance to be dissolved is contained in one of the containers and is rinsed and moistened with fresh quantities of solvent by the operation of the moi ement of the liquid result iug from the increase of specific gravity of the solution produced in the dissolving operation.

In accordance with our invention means are provided in connection with a device of the general character above referred to of regulating the rate at which the dissolving takes place by providing a valve or the like in the circulating path of the liquid, such valve having means to allow of a variation of the free sectional passage for the liquid. This regulatable valve is preferably mounted at the lower communicating passage be tween the two containers, and it may for instance comprise an adjustable core or the like. In pursuance thereof the regulation and control of the rapidity of solution which is effected by the variation of sectional passage presented to the flow of liquid between the two containers charged with solvent, provides means of preventing undesirably rapid solution and the formation of an undissolved residue of the solid substance. In the absence of controlling means of this kind the dissolving procedure takes place at an excessively rapid rate, and in consequence thereof the solution flowing from the container for the solid substance to the other container and in the lower portions thereof will soon accumulate in the latter container to such a height, as to arrest the admission of fresh solvent into the container first re- Serial No. 53,808.

1 erred to, before the solid substance has been completely dissolved. This will result in an undissolved solid residue, unless provision is made in accordance with our invention to control and adjust the rate of solution to the proper degree.

The invention will be more fully described with reference to the accompanying drawing, showing by way of example and in a somewhat diagrammatic manner several forms of embodiment of the principles of our invention, in vertical section in Figures 1, 2 and Figure 3.

Referring particularly to Figure 1 it will be noted that the two containers A. and B are connected toeach other by a bottom conduit C and near their upper ends by an overflow D. In'the conduit passage C a valve E of regulatable free flow sectionis inserted. The solid substance to be dissolved, thus for instance, a solid lump of caustic soda Fis introduced into the container A and upon the sieve G. The solvent is admitted through the cock H and is caused to fill the two containers A and B, until the level of the liquid is somewhat above the overflow D. The lump of soda or the like in contact with the liquid begins to be dissolved, and the solution obtained being heavier than the solvent,

descends through the container A and past the passage C to the bottom of the container A, andin consequence thereof fresh solvent will fiow from the container B by way of the overflow D into the container A and onto the block or lump F. By means of the valve E the dissolving rate is adjusted to the proper degree, so that a complete solution of the solid piece of caustic soda or the like is obtained.

The two vessels or containers, as appears from Figure 2, may also be mounted one within the other. Vhcn so arranged, the vessel A is preferably funnel shaped. For the regulation of the dissolving speed a cone K is provided at the bottom end of the tube J of the funnel-shaped vessel A, the said cone being adjustable with relation to the tube J by means of a set screw L pr0- vided in the bottom of the container B. In the vessel A the lump of caustic soda is placed upon thesieve N. The solution is introduced through the cock M. The procedure is the same as in the case of the arrangement according to Figure 1,- the dissolving rate-"bei'ngcontrolled with-relation to its speed by the cone K.

Theupper con'ununicat-ion otthe two ves sels maybeofi'ccted by a syphon instead of by an overflow, the said syphon serving at the same time as a, means of admitting the solvent. In Figure 1 such a syphon is shown in dotted lines at O which by meanso'fa cock Q may be connected to the main conduit P. i i

In Figure 3 we have shown a third modification of the device inaccordance with our invention which allows of a very eziicient and economicalutilization oftheexothermic heat of solution,- the container A for the reception of the solid substance to be dissolved F is connected in this embodiment to a container B" by means of the pipe J which is preferably of comparatively small diameter and at the bottom end of which the conical regulating valve K; is disposed, while the con'tiiineirB by means of a pipe J is con nected to'th'e container B. The pipe J roncentrically surrounds the pipe 'J and is slightly spaced therefrom, and the container B likewise surrounds the container A at a slight distance thereof; The substance F maybe suspended in the dissolving liquid from a. hook S. The heat which is exothern'ii'cally generated in the dissolving procedure acts upon the solvent admitted to the device by means of the walls of the pipe J and of the container A, sons to preheat said solvent and to thereby greatly facilitate the dissolving procedure. By means of the controlling or regulating valve K the proper rate of dissolving.activity may be adjusted in this embodiment likewise.

The device in accordance with our invention may of course also be embodied in other constructions difl erent from those herein shown by way of eXemplitication only. Thus, for instance, we may replace the valve by any other suitable and appropriate means, such as a slide, forinstance, a faucet, cock, a throttling valve. damper or the like, and other changes and modifications may be made to better adapt the invention to varying conditions of application, and without thereby departing from the scope and spirit of the invention. as set forth in the claims hereunto appended. It is. of course to be understood that the invention is not limited to the specific physical condition, consistence and behavior of the substance to bedissolved or otherwise treated; and it is obvious that the solution may boobtained by chemical decon'iposition.

e claim h 1. lug, dissolvihg; device the conihination with two containers, in one of which the substance to be dissolved is placed, and comu'iuni'cation means between the upper and lowerpa'rts of said containers, of a-valve for rcgulatingthe trees'eeti'onal passage of the ommunicating Y mean-s ah lthe 'c'lissol'vi-ilig rate, andsolvent-adi'nitting means associated with the containers whereby the saturated fluid will be collected by grai ity in the lower portion of the container.

2. In a dissolving device the combination with two connected containers one of which is provided with supporting means for the substanceto be dissolved is placed, and communicating means respectively con necting the upper portions and the lower portions of the containers, of an adjustable valve for the lower communicating; means, adapted to control the rate of low and the dissolving rate of the solvent, and solventadmitting means associated with the containers.

3. In a dissolving device the combination with two solvent containers. one of which is provided at its upper portion with means for supporting the substance to be dissolved and communicating means, respectivelyconnecting the upper portions and the lower portions of said containers. and a valve opcratively connected to the lower portion of the con'imunicating' means, whereby the saturated fluid will be collected in the low-er portion of the container.

4. In a dissolving device iii-combination two solvent-charged containers, spacedly surrounding each other and in one of which the substance under treatment is disposed, comn'iunicating means respectively connecthit; the top portions and the bottom portions of the containers. and conical valve regulating means in the bottom communicating means.

5. In a dissolving device in con ihination. an inner container, open at both ends and provided with a support for material to be reduced to fluidity, an outer container which encompasses the inner container, means adapted to maintain the material to be treated in said container. means for supplyingr a fluid solvent to the outer couta iher, and flow regulating means adapted to enter the open endat the bottom ofthe inner container.

G. In a dissolving; device, in con'il'iination. an interior open ended tube, an extension at the upper end thcreotand adapted to maintain therein the substance under treatment, an outer partially tubular container surrounding the middle portion and the upper extension oi the inner tube, and spaced therefrom, a lower extension on the outer containersurrounding the lower portion of the inner tube, flow regulating means adapted to enter the lower part of the inner tube, and means for supplying a solvent to the containers.

Th testimony whereof we atlix our signatitres-.-

DR. EBIIL. GZAPIEIQ R QH D were e a up, 

